I have a 2011 MacBook Pro. I decided to erase all contents and reinstall the OS. I used the original installation DVD, but I could not install the OS: after the boot I could only enter Disk Utility. I verified the hard disk and it was OK. I did a hardware test and all tests pass with no error.
When I do an installation of OSX on the hard disk, the Mac hangs for hours. I hear the DVD drive spin up, and after some time it spins down again. After that the computer displays the grey apple screen only.
Because the original installation disk looked scratched I assumed that the DVD may be damaged. I ordered a new installation disk from Apple (Mac OS X Snow Leopard - with a green sticker
New version 10.6.3). When I start up from this DVD it only displays the grey Apple screen, I can't even select an installation language or use the Disk Utility; It's as if the DVD is not bootable.
What could be wrong? What could be my next step?